FEM Modelling of Weld Damage in Continuous Cold Rolling of MIG/MAG Butt-Welded Stainless Steel Strips

Weld line fracture of butt-welded strips in stainless steel continuous rolling has been studied by numerical simulation using ForgeNxT®. The plan includes weld geometry as well metal constitutive model parameters. damage criterion used is the non-dimensional Latham & Cockroft function near singular points line. Results are confronted to qualitative observations frequency and initiation loci on Not surprisingly, protrusion height with respect strip top surface found be a major factor risk. A second one pertains nature alloys used: due mushroom-like cross-section geometry, at junction base becomes critical when harder than metal. Finally, investigated, prior properly speaking, goes through scale-breaking unit followed acid pickling eliminate oxides; multiple, reverse plastic bending applied there contributes significantly ductile damage, completing explanation why locus always same